Assembled type membrane bioreactor

The utility model discloses an assembled type membrane bioreactor. The assembled type membrane bioreactor comprises an independent dismountable anaerobic region component, an independent dismountable anoxic region component, an independent dismountable aerobic region component and an independent dismountable membrane region component, wherein the anaerobic region component and the anoxic region component are connected with the aerobic region component and the membrane region component by pipelines in order to realize smooth water flow and reflux of water flow. The treatment capacity can be regulated by additionally arranging or dismounting constituent parts according to specific conditions of a water body and water quantity so that the assembled type membrane bioreactor is more adaptive to changes of amount of treated water; by using independent assembled structures, the problem of poor treatment capacity of a single set of membrane bioreactor is effectively solved and the treatment effect is guaranteed as well; moreover, the shortcomings of large energy consumption and poor effect of an existing aerobic membrane bioreactor and the shortcomings that components of a facultative aerobic membrane bioreactor are easy to block and short in service life are optimized, the treatment effect is enhanced, and the service life of membrane components is prolonged as well, so a better choice is provided for wide application of a membrane bioreactor process.